CN112443561A

CN112443561A - Free rotation structure

Info

Publication number: CN112443561A
Application number: CN201910822243.6A
Authority: CN
Inventors: 林俊仁
Original assignee: Huizhou Huachuang Bolin Network Technology Co ltd
Current assignee: Huizhou Huachuang Bolin Network Technology Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-03-05

Abstract

The invention discloses a free rotation structure, comprising: the first joint is provided with a first accommodating cavity; the second joint is provided with a second accommodating cavity; and the bearing is accommodated between the first accommodating cavity and the second accommodating cavity, and the first joint and the second joint can freely rotate in 360 degrees by virtue of the bearing. The invention has simple structure, simple and convenient assembly and convenient operation, and is suitable for wide popularization and application.

Description

Free rotation structure

Technical Field

The invention relates to a connecting structure, in particular to a structure capable of freely rotating 360 degrees.

Background

Among the existing industrial demands, the 360-degree free rotation joint is widely applied. Such as office chair wheels, automation equipment conveyor belts, scooter taps, 360 degree rotating cameras, etc., all require 360 degree free rotation. At present, a connector capable of freely rotating 360 degrees usually adopts a rotating core structure, a connector body and a pressing body, and other auxiliary components such as nuts and plastic pads exist, so that the structure is complex and the assembly is inconvenient.

Therefore, it is desirable to provide a free-rotation structure with simple structure, easy assembly and convenient operation to overcome the above drawbacks.

Disclosure of Invention

The invention aims to provide a free rotation structure which is simple in structure, simple and convenient to assemble and convenient to operate.

In order to achieve the above object, the present invention provides a free-rotation structure comprising:

the first joint is provided with a first accommodating cavity;

the second joint is provided with a second accommodating cavity; and

the bearing is accommodated between the first accommodating cavity and the second accommodating cavity, and the first joint and the second joint can freely rotate in 360 degrees by virtue of the bearing.

Based on the free rotation structure of the invention, the first joint is provided with the first accommodating cavity, the second joint is provided with the second accommodating cavity, and the first joint and the second joint can freely rotate in 360 degrees without an additional connecting body by virtue of the bearing accommodated between the first accommodating cavity and the second accommodating cavity. The connector is simple in structure, convenient to assemble and very convenient to operate, and 360-degree free rotation of the external connecting component can be achieved only by connecting the two connectors with the external connecting component.

Preferably, the bearing comprises a central passage, an inner ring, an outer ring and a layer of balls between the inner and outer rings.

Specifically, an extension section extends from the bottom wall of the second accommodating cavity to the first assembling surface, and the extension section penetrates through the bearing and is in interference fit with the central channel of the bearing.

Preferably, the extension section includes a stepped portion and a through section formed on the stepped portion and having a smaller diameter than the stepped portion.

Preferably, the penetrating section is in interference fit with the central channel, the inner ring is in surface contact with the step part, and the ball layer is suspended without contacting the step part.

Specifically, the outer wall of the outer ring of the bearing is in interference fit with the inner peripheral wall of the first accommodating cavity.

Preferably, an outer wall of the outer ring of the bearing is not in contact with an inner circumferential wall of the second accommodating cavity.

Preferably, the first joint has a first assembling surface provided with the first accommodating cavity and a first connecting portion arranged on an opposite surface of the first assembling surface; the second joint is provided with a second assembling surface which is provided with the second containing cavity and is attached to the first assembling surface, and a second connecting part which is arranged on the opposite surface of the second assembling surface.

Preferably, the first connecting part is a threaded or unthreaded cylinder, square column or corner column, and the second connecting part is a threaded or unthreaded cylinder, square column or corner column.

Preferably, a first channel penetrates from the bottom wall of the first accommodating cavity to the outer end face of the first connecting portion, and a second channel penetrates from the bottom wall of the second accommodating cavity to the outer end face of the second connecting portion.

Drawings

FIG. 1 is a perspective view of one embodiment of a free-wheeling structure of the present invention.

Fig. 2 is another perspective view of one embodiment of the free-wheeling structure of the present invention.

Fig. 3 is an exploded view of one embodiment of the free-wheeling structure of the present invention.

Fig. 4 is another exploded view of one embodiment of the free-wheeling structure of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

As shown in fig. 1-2, the free-rotation structure 100 of the present invention includes a first joint 10, a second joint 20, and a bearing 30 accommodated between the first joint 10 and the second joint 20, wherein the first joint 10 and the second joint 20 can freely rotate in 360 degrees by the bearing 30. The free wheeling joint 100 of the present invention is suitable for use on articles that are free wheeling 360 degrees, including but not limited to: wheels of office chairs, conveying belts of automation equipment, a scooter faucet and a 360-degree rotary camera.

Specifically, referring to fig. 3-4, the first joint 10 has a first assembling surface 102 with a first receiving cavity 101 and a first connecting portion 103 disposed on an opposite surface of the first assembling surface 102, the second joint 20 has a second assembling surface 202 with a second receiving cavity 201 and attached to the first assembling surface 102 and a second connecting portion 203 disposed on an opposite surface of the second assembling surface 202, and the bearing 30 is received between the first receiving cavity 101 and the second receiving cavity 201. Preferably, the bearing 30 is completely housed between the first housing chamber 101 and the second housing chamber 201 without being exposed to the outside.

As shown in fig. 3-4, the bearing 30 includes a central passage 301, an inner race 302, an outer race 303, and a ball layer 304 positioned between the inner race 302 and the outer race 303.

As shown in fig. 3, the diameter of the first receiving cavity 101 of the first joint 10 is slightly smaller than the diameter of the bearing 30 by about 0.04mm, so that the inner peripheral wall of the first receiving cavity 101 is in interference fit with the outer wall of the outer ring 302 of the bearing 30. The first coupling portion 103 is disposed opposite to the first fitting surface 102, i.e., outwardly disposed, to be coupled to an external member to be rotated. Preferably, the first connecting portion 103 is threaded. Of course, the first connecting portion 103 may be a cylinder, a square column or a corner column without a screw structure. Preferably, a first passage 104 penetrates from the bottom wall of the first receiving cavity 101 to the outer end face of the first connecting portion 103, and the first passage 104 is preferably aligned with the central passage 301 of the bearing 30.

As shown in fig. 4, an extension section 210 extends from a bottom wall, preferably a center of the bottom wall, of the second receiving cavity 201 of the second joint 20 in a direction toward the first assembling surface of the first joint, and the extension section 210 passes through the bearing 30 and is in interference fit with a central passage 301 of the bearing 30. Preferably, the extension section 210 includes a step portion 211 and a penetrating section 212 formed on the step portion 211 and having a smaller diameter than the step portion 211. Specifically, the stepped portion 211 and the penetrating segment 212 are coaxial and cylindrical. After the extension section 210 is inserted into the central passage 301 of the bearing 30, the diameter of the insertion section 212 is slightly larger than that of the central passage 301, so as to be in interference fit therewith; the inner ring 302 of the bearing 30 is in surface contact with the step portion 211, and the ball layer 304 of the bearing 30 is not in surface contact with the step portion 211, but is in a suspended state at a distance from the bottom wall of the second accommodating cavity 201, where the distance is the height of the step portion 211. This has the advantage of ensuring that, in operation, the bottom wall of the second housing chamber 201 does not contact the ball layer 304 of the bearing 30, making it rotate more smoothly. The diameter of the second accommodating cavity 201 is greater than that of the bearing 30, so that the outer wall of the outer ring 302 of the bearing 30 is not in contact with the inner peripheral wall of the second accommodating cavity 201, and when the first joint 10 and the outer ring 303 of the bearing 30 in interference fit with the first joint rotate, the rotation of the second joint 20 is not affected, and the rotation of the first joint and the outer ring 303 of the bearing 30 is smoother.

Specifically, the second connection portion 203 is disposed opposite to the second fitting surface 202, i.e., outwardly disposed, to be connected to an external member to be rotated. Preferably, the second connecting portion 203 is threaded. Of course, the second connection portion 203 may be a cylinder, a square column or a corner column without a screw structure. Preferably, a second channel 204 extends through the outer end surface of the second connecting portion 203 facing the outer end surface of the extension 210, and the second channel 204 is preferably aligned with the central channel 301 of the bearing 30. That is, the first channel 104, the second channel 304 and the central channel 301 are aligned, and the three channels can be used for passing power lines, so as to adapt to the application with wiring requirements.

In the present embodiment, the bodies of the first and

second joints

10 and 20 are hexagonal, but the present invention is not limited thereto, and other embodiments may employ polygonal shapes such as triangular shapes and quadrangular shapes, circular shapes, semicircular shapes, and elliptical shapes.

According to the free rotation structure 100 of the present invention, the first joint 10 is provided with the first receiving cavity 101, the second joint 20 is provided with the second receiving cavity 201, and both the first joint 10 and the second joint 10 can freely rotate 360 degrees by the bearing 30 received between the first receiving cavity 101 and the second receiving cavity 102. Specifically, after the first joint 10, the second joint 20 and the bearing 30 are assembled, since the outer ring 303 of the bearing 30 is in interference fit with the first accommodating cavity 101 of the first joint 10, the outer ring 303 of the bearing 30 is not in contact with the second accommodating cavity 201 of the second joint 20, and the inner ring 302 of the bearing 30 is in interference fit with the extending section 210 of the second joint 20, the first joint 10 and the second joint 20 can freely rotate 360 degrees without interfering with each other. When connected to an external member, the first and

second connection portions

103 and 203 of the first and

second joints

10 and 20, which are convex, are each connected (e.g., by screwing) to a corresponding member, so that the corresponding member can freely rotate 360 degrees. The free rotation structure has simple structure and simple and convenient operation, and is suitable for wide popularization and application.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.

Claims

1. A free-wheeling structure comprising:

the first joint is provided with a first accommodating cavity;

the second joint is provided with a second accommodating cavity; and

2. The free-spinning structure of claim 1, wherein: the bearing includes a central passage, an inner race, an outer race, and a ball layer between the inner race and the outer race.

3. The free-spinning structure of claim 2, wherein: the bottom wall of the second accommodating cavity extends to the first assembling surface to form an extending section, and the extending section penetrates through the bearing and is in interference fit with the central channel of the bearing.

4. The free-spinning structure of claim 3, wherein: the extension section comprises a step part and a penetrating section which is formed on the step part and has a diameter smaller than that of the step part.

5. The free-spinning structure of claim 4, wherein: the penetrating section is in interference fit with the central channel, the inner ring is in surface contact with the step part, and the ball layer is not in contact with the step part and is suspended.

6. The free-spinning structure of claim 2, wherein: the outer wall of the outer ring of the bearing is in interference fit with the inner peripheral wall of the first accommodating cavity.

7. The free-spinning structure of claim 2, wherein: the outer wall of the outer ring of the bearing is not in contact with the inner peripheral wall of the second accommodating cavity.

8. The free-spinning structure of claim 1, wherein: the first joint is provided with a first assembling surface provided with the first accommodating cavity and a first connecting part arranged on the opposite surface of the first assembling surface; the second joint is provided with a second assembling surface which is provided with the second containing cavity and is attached to the first assembling surface, and a second connecting part which is arranged on the opposite surface of the second assembling surface.

9. The free-spinning structure of claim 8, wherein: the first connecting part is a cylinder, a square column or an angle column with or without threads, and the second connecting part is a cylinder, a square column or an angle column with or without threads.

10. The free-spinning structure of claim 8, wherein: a first channel penetrates from the bottom wall of the first accommodating cavity to the outer end face of the first connecting portion, and a second channel penetrates from the bottom wall of the second accommodating cavity to the outer end face of the second connecting portion.